岩溶断陷盆不同深度土壤微生物量碳氮对植被演替的响应
S154.2; 为了解岩溶断陷盆地底部不同植被类型土壤微生物量碳氮(MBC、MBN)含量的变化,以中国西南典型生态脆弱区云南省岩溶断陷盆地底部原始森林、草地、人工林、灌丛和玉米地土壤为研究对象,探究土壤微生物量碳氮对植被类型的响应.结果表明:灌丛类型土壤微生物量碳氮含量最高,微生物量碳氮含量随植被正向演替呈现先增大后减小的趋势;各植被类型土壤微生物量碳含量随土层深度增加而降低.多因素方差分析出土层深度和植被类型是土壤微生物量碳含量的显著影响因素(P＜0.05),其中土层深度是土壤微生物量碳含量的极显著影响因素(P＜0.01)....
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| Published in | 中国岩溶 Vol. 42; no. 5; pp. 1098 - 1105 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室/联合国教科文组织国际岩溶研究中心,广西桂林 541004
01.10.2023
广西平果喀斯特生态系统国家野外科学观测研究站,广西平果 531406 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-4810 |
| DOI | 10.11932/karst20230519 |
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| Abstract | S154.2; 为了解岩溶断陷盆地底部不同植被类型土壤微生物量碳氮(MBC、MBN)含量的变化,以中国西南典型生态脆弱区云南省岩溶断陷盆地底部原始森林、草地、人工林、灌丛和玉米地土壤为研究对象,探究土壤微生物量碳氮对植被类型的响应.结果表明:灌丛类型土壤微生物量碳氮含量最高,微生物量碳氮含量随植被正向演替呈现先增大后减小的趋势;各植被类型土壤微生物量碳含量随土层深度增加而降低.多因素方差分析出土层深度和植被类型是土壤微生物量碳含量的显著影响因素(P＜0.05),其中土层深度是土壤微生物量碳含量的极显著影响因素(P＜0.01). |
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| AbstractList | S154.2; 为了解岩溶断陷盆地底部不同植被类型土壤微生物量碳氮(MBC、MBN)含量的变化,以中国西南典型生态脆弱区云南省岩溶断陷盆地底部原始森林、草地、人工林、灌丛和玉米地土壤为研究对象,探究土壤微生物量碳氮对植被类型的响应.结果表明:灌丛类型土壤微生物量碳氮含量最高,微生物量碳氮含量随植被正向演替呈现先增大后减小的趋势;各植被类型土壤微生物量碳含量随土层深度增加而降低.多因素方差分析出土层深度和植被类型是土壤微生物量碳含量的显著影响因素(P＜0.05),其中土层深度是土壤微生物量碳含量的极显著影响因素(P＜0.01). |
| Abstract_FL | The karst fault basin in Yunnan Province is a typical ecological fragile area in Southwest China,and it is characterized by dramatic topographic changes,coexistence of faulted basins,basins and mountains,and seasonal drought and water shortage,so surface water erosion likely occurs.Soil microorganism promotes the circulation of nutrient elements in soil,among which microbial biomass carbon(MBC)and microbial biomass nitrogen(MBN)—the indicators of soil quality—are of great research significance.In this study,primitive forests,grasslands,artificial forests,shrubs and corn fields in the karst fault basin of Yunnan were selected as the study objects.The changes of MBC and MBN in soil were measured,and then their response to vegetation types was analyzed.
The results showed that the contents of soil MBC and MBN in shrubs were the highest,indicating that the shrubs in this study area are more conducive to the accumulation of soil MBC and MBN.In contrast,the contents of soil MBC and MBN in primary forests were lower than those in shrubs,which was considered to be the result of the the decrease of effective nutrients available for vegetation growth due to the degradation of primary forests,or the intense competition between plant growth and microorganisms for nutrients in primary forests and the fact that the demand capacity of vegetation growth was greater than the conversion capacity of soil microorganisms.The study also found that the contents of MBC and MBN increased at first and then decreased with vegetation succession,which may be related to the organic matter content and oxygen availability as well as the surface layer that conforms to microbial growth conditions.The content of soil MBC decreased with the increase of soil depth.Moreover,the soil depth and vegetation type are the significant influencing factors of the content of soil MBC(P＜0.05),and the soil depth was the most significant factor(PP＜0.01).These findings provide a theoretical basis for the control of soil erosion and rocky desertification in karst fault basin of Yunnan Province. |
| Author | 李强 严嘉慧 邱江梅 |
| AuthorAffiliation | 中国地质科学院岩溶地质研究所/自然资源部、广西岩溶动力学重点实验室/联合国教科文组织国际岩溶研究中心,广西桂林 541004;广西平果喀斯特生态系统国家野外科学观测研究站,广西平果 531406 |
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| Author_FL | LI Qiang YAN Jiahui QIU Jiangmei |
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| DocumentTitle_FL | Response of soil microbial biomass carbon and nitrogen to vegetation succession in different soil depths of karst fault basin |
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| Keywords | fault basin 微生物量碳 岩溶 microbial biomass carbon vegetation types karst 微生物量氮 断陷盆地 植被类型 microbial biomass nitrogen |
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| Title | 岩溶断陷盆不同深度土壤微生物量碳氮对植被演替的响应 |
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